<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div class="nav">
        <img src="../assets/mainlogo.jpg" style="width:50px;height:50px;" alt />
        <span>小权商城后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          class="el-menu-vertical-demo"
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          :unique-opened="true"
          :collapse='isCollapse'
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menulist " :key="item.id">
            <!-- 一级菜单的模板 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path+''" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data(){
   return {
     menulist:[],
     iconsObj:{
       '125':'iconfont icon-users',
       '103':'iconfont icon-tijikongjian',
       '101':'iconfont icon-shangpin',
       '102':'iconfont icon-danju-tianchong',
       '145':'iconfont icon-baobiao'
     },
     //是否折叠
     isCollapse:false,
     //被激活的链接地址
     activePath:''
   
   }

  },

  created(){
    this.getMenuList()
    this.activePath=window.sessionStorage.getItem('activePath')

    }, 

  methods: {
    // 退出功能  基于token的方式实现退出功能，只需销毁本地的token即可。后须重新登录生成一个新的token才能访问页面
    logout() {
      //清空token
      window.sessionStorage.clear();
      //跳转到登录页
      this.$router.push("/login");
    },
   //获取所有菜单
    async  getMenuList(){
      const {data:res} =await this.$http.get('menus')
       console.log(res)
      if(res.meta.status!==200)return this.$message.error(res.meta.msg)
      this.menulist=res.data
     
    },
    //点击按钮切换菜单折叠展开
    toggleCollapse(){
      this.isCollapse=!this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
          this.activePath=activePath
    }

  },
};
</script>

<style  scoped>


.home-container {
  height: 100%;
}
.el-header {
  padding: 0;
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-size: 20px;
}
.nav {
  display: flex;
  align-items: center;
}
span {
  margin-left: 15px;
}
.el-aside {
  background-color: #333744;
}
.el-menu{
  border-right: none;
  /* 去掉边框线 */
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 5px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  display: flex;
  justify-content: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>